[srslte-users] Plain UL NAS: Authentication Failure

[putaogan]

Dear all，
Yesterday i succeeded in connecting my phone to srsepc and have access to internet.
But today i try again and find something wrong.
I can find something in srsepc as follows:
Received Attach Request 
Attach Request -- IMSI-style attach request
Attach Request -- UE is already attached.Attach request -- IMSI: 001010123456789
Attach request -- eNB-UE S1AP Id: 2, MME-UE S1AP Id: 2
Attach request -- Attach type: 2
Attach Request -- UE Network Capabilities EEA: 11110000
Attach Request -- UE Network Capabilities EIA: 01110000
Attach Request -- MS Network Capabilities Present: true
PDN Connectivity Request -- EPS Bearer Identity requested: 0
PDN Connectivity Request -- Procedure Transaction Id: 16
PDN Connectivity Request -- ESM Information Transfer requested: true
Downlink NAS: Sending Authentication Request
Plain UL NAS: Authentication Failure
Sequence number synch failure
Downlink NAS: Sent Authentication Request
DL NAS: Sent Downlink NAS Message. DL NAS Count=0, UL NAS count=1
DL NAS: MME UE S1AP id 2
Plain UL NAS: Authentication Failure
Sequence number synch failure
Downlink NAS: Sent Authentication Request
DL NAS: Sent Downlink NAS Message. DL NAS Count=0, UL NAS count=2
DL NAS: MME UE S1AP id 2
Received UE Context Release Request. MME-UE S1AP Id 2
UE is not ECM connected. No need to release S1-U. MME UE S1AP Id 2
UE is ECM IDLE.
The epc.log is in the attachment.
If angone knows the reason about this,please let me know.


Thanks.
Dongxu











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